Low-weight infant diaper

Abstract

A low-weight infant diaper has a longitudinal direction and a width direction that intersect each other. The low-weight infant diaper includes: an exterior sheet disposed closer to a non-skin side than an absorbent body; and a belt including a first locking member on a first side in the width direction and a second locking member on a second side opposite to the first side in the width direction. The belt is locked to a non-skin side of the exterior sheet by the first locking member. The belt includes a first additional joining portion that causes a part of the belt to join the exterior sheet. The first additional joining portion is disposed in a region in the first side.

What is claimed is: 
     
       1. A low-weight infant diaper having a longitudinal direction and a width direction that intersect each other, the low-weight infant diaper comprising:
 an exterior sheet disposed closer to a non-skin side than an absorbent body; and 
 a belt that comprises:
 a first locking member on a first side in the width direction; and 
 a second locking member on a second side opposite to the first side in the width direction, wherein 
 
 the belt is locked to a non-skin side of the exterior sheet by the first locking member, 
 the belt comprises a first additional joining portion that causes a part of the belt to join the exterior sheet, 
 the first additional joining portion is disposed in a region in the first side and overlaps the first locking member, 
 the belt further comprises a second additional joining portion, and 
 the first and second additional joining portions are respectively disposed in two widthwise end portions of the first locking member. 
 
     
     
       2. The low-weight infant diaper according to  claim 1 , wherein the first additional joining portion is disposed outward in the longitudinal direction farther than a center of the belt. 
     
     
       3. The low-weight infant diaper according to  claim 1 , wherein
 the first and second additional joining portions are disposed at an outward end of the longitudinal direction in the first locking member, and 
 the first and second additional joining portions are disposed at both ends of the width direction in the first locking member, respectively. 
 
     
     
       4. The low-weight infant diaper according to  claim 1 , wherein the first additional joining portion is not overlapped with the first locking member in the belt. 
     
     
       5. A low-weight infant diaper having a longitudinal direction and a width direction that intersect each other, the low-weight infant diaper comprising:
 an exterior sheet disposed closer to a non-skin side than an absorbent body; and 
 a belt that comprises:
 a first locking member on a first side in the width direction; and 
 a second locking member on a second side opposite to the first side in the width direction, wherein 
 
 the belt is locked to a non-skin side of the exterior sheet by the first locking member, 
 the belt comprises a first additional joining portion that causes a part of the belt to join the exterior sheet, 
 the first additional joining portion is disposed in a region in the first side and is not overlapped with the first locking member in the belt, 
 the belt further comprises a second additional joining portion, 
 the first additional joining portion is disposed inward in the width direction nearer than an inward end of the first locking member, and 
 the second additional joining portion is disposed outward in the width direction farther than an outward end of the first locking member. 
 
     
     
       6. The low-weight infant diaper according to  claim 5 , wherein in the width direction, a distance between an inward end of the belt and a center position of the first additional joining portion is longer than a distance between the inward end of the first locking member and the center position. 
     
     
       7. The low-weight infant diaper according to  claim 5 , wherein in the width direction, a distance between an outward end of the exterior sheet and a center position of the second additional joining portion is longer than a distance between the outward end of the first locking member and the center position. 
     
     
       8. A low-weight infant diaper having a longitudinal direction and a width direction that intersect each other, the low-weight infant diaper comprising:
 an exterior sheet disposed closer to a non-skin side than an absorbent body; and 
 a belt that comprises:
 a first locking member on a first side in the width direction; and 
 a second locking member on a second side opposite to the first side in the width direction, wherein 
 
 the belt is locked to a non-skin side of the exterior sheet by the first locking member, 
 the belt comprises a first additional joining portion that causes a part of the belt to join the exterior sheet, 
 the first additional joining portion is disposed in a region in the first side, 
 the belt further comprises one or more other additional joining portions, and 
 a sum length occupied by the first additional joining portion and the one or more other additional joining portions in the belt in the longitudinal direction is shorter than a sum length occupied by the first additional joining portion and the one or more other additional joining portions in the belt in the width direction. 
 
     
     
       9. The low-weight infant diaper according to  claim 8 , wherein a longitudinal length of each of the first additional joining portion and the one or more other additional joining portions is shorter than a widthwise length of each of the first additional joining portion and the one or more other additional joining portions.